Those single stars in the last two reviews make no sense as they don't rate the product. I have hypothyroid, as do my three sisters, who are all on prescription meds. In the past year and a half, I have been feeling "beat" all the time and lacking motivation to work out due to fatigue. I took this product and in three days (that's no exaggeration), I am back to my old self. I even beat my sprint-on-the-treadmill record this morning. I feel way more powerful and confident and youthful. My husband commented on this as well.

This product really works! I didn't think so at first but I continued using it and in 3 weeks time I feel that my digestion has improved, as well as some aches in my sides have vanished. And the added plus is that I am losing weight I now have plenty of energy to walk more than ever! I would recommend this product to anyone who has a sluggish thyroid and/or digestive system. Thank you IHerb for your great prices and quick deliveries.

I've been taking this product for a few years and when I have run out I noticed a decrease in my energy level. I don't have the side effects with this product as I did when I was on prescription medications for my thyroid.